Omron NX-ECC201 User Manual

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5 Designing the Power Supply System
NX-series EtherCAT Coupler Unit User’s Manual (W519)
5-4 Selecting External Power Supplies and Protective Devices
5
5-4-1 Selecting the Unit Power Supply
5-4 Selecting External Power Supplies
and Protective Devices
This section describes how to select the external power supplies and protective devices for the EtherCAT
Slave Terminal, i.e., the Unit power supply and the I/O power supplies.
This section describes how to select the Unit power supply for the EtherCAT Slave Terminal.
Use an SELV power supply that meets the following conditions for the Unit power supply.
• Has overcurrent protection.
• Has double or reinforced insulation between the input and output.
• Has an output voltage of 24 VDC (20.4 to 28.8 VDC).
Recommended Power Supplies: S8JX Series (manufactured by OMRON)
 Formula
This section describes how to calculate the required capacity of the Unit power supply for the Ether-
CAT Slave Terminal.
Use the following formula to calculate the required Unit power supply capacity for each block in the
EtherCAT Slave Terminal.
Required Unit power supply capacity of each block = (A + B)/C
A: NX Unit power consumption of the Unit that supplies the NX Unit power
B: Total NX Unit power consumption of the NX Units that are connected to the Unit that supplies the NX Unit power
C: NX Unit power supply efficiency of the Unit that supplies the NX Unit power
 Blocks
A block consists of the Unit that supplies the NX Unit power and the range of Units to which that Unit
supplies the NX Unit power. For example, in the configuration in the following figure there are two
blocks in the EtherCAT Slave Terminal: the block with the EtherCAT Coupler Unit and the block with
the Additional NX Unit Power Supply Unit.
5-4-1 Selecting the Unit Power Supply
Recommended Power Supplies
Calculating the Required Power Supply Capacity of the Unit Power
Supply
Required capacity of the Unit power supply
for the EtherCAT Slave Terminal
=
Total of required Unit power supply capacity
for each block

Omron NX-ECC201 Specifications

General

Brand	Omron
Model	NX-ECC201
Category	Controller
Language	English